Brake adjuster



Dec.'2, 1930. BR051- 1,783,902

' BRAKE ADJUSTER Fiied April 12, 1929 2 Sheets-Sheet -1 INVENTDR ATTORNEY H. BROST BRAKE ADJUSTER Dec. -2, 1930.

Filed April 12. 1929 2 Sheets-Sheet 2 Aenry Bros! INVENTOR ATTORNEY 3 Figure 6 is: an elevation, partly in Patented Dec. 2,- 1930 mm mm sanxm mm isn I v L U Applicationfiled April 12,

1Thisfinvention relates to devices for use in adjusting the'brakes of an automobile, an object being to provide a .device'bymeans of which on'eiman' may expeditiously and ac- 5 ourately' adjusts" the brakes "and thussave the 1 services of i the additional man -,usually required; J' n 3:

. To this'end-the invention provides a power operated'fdevice iwhioh m'ay be attached to 1 V 51.0 the servicebrake :pedaliand: operated-t0: Hip-r ply the brakes so that the mechanic :adj'ustingthe brakes l-Inay determine their action, means beingprovided whereby the-mechanic referred to maycbntrolthe operation of the j device so that he may apply andreleaseithe brakeslatwill. :1:

WitlitheabOve and otherobjects in view,

the] invention further inclu'desrthe following novel features and details of construction,

2 tobe hereinafter more :fully described'pillustrated in the accompanying drawings and pointedout inthe appended claims.

@In the drawingsk if Figurel' is an elevation illustrating the in vention in position for, use, .a portion offan automobile being'shown-iin outline; 1

. "Figure 2-is 'a-planuview of the" invention persei" Figure 3'is a section on the line 3''3 of 5 indicates the -floor line of an automobile and 11 the steeringpost,-while the'ser'vice brake pedal is-indicated'at 12;; j i As is well known, when adjusting theserv- 'icebrakes of an automobile it is necessary that 0 the mechanic or. other person operate, the

shaft of a motor'20.

O d' ft e pi ma is-p v al y eb ed brake pedal so the adgustment can see-the action of the'b'rakes.

The present invention eliminates the service I of a mechanic for operating the brake pedal by. providing mechanical means for op erating ;5 5

the brake pedal which; is controlled by the mechaniomaking theadjustment. T

y i As shown in thedrawings: this means consists'of agear boxlfiwithin which} is housed j a worlnl lsmountedon axsliaft 15, the latter '60 operating in friction bearings; 16.;-- The shaft 1 5 has fast'thereonagrooved pulleyl'? which is driven by a belt 18 and pu1ley'19, the last mentioned pulley being 'mounted -upon the I 1111 order to mount).the?ge'ar upon 7 -'thefmotor, the inventionprovides; a saddle 20a? and this saddle isprovi'ded with spaced ears 20?) rernovably attachedi to the motor,

and with spaced parallel fianges 200 remov- -70 ablyattachedtothe gear boX 13.

- The worm 14:, drives a gear 21} which ispO'i- 'sitioned within the gear box and this gear-is mounted upona shaft 22 which operates in anti-friction bearings 23." The shaft 22 ex: 7 7

tends beyond the gear box and hastfast thereon; a'col1ar24fron1' which prOjeots'apin25.

A crank a'rm l26 is mounted for free rotation upon theshaft 22 andtheoutwardly extending portion2Z of the crank arm 26 is pivotally so and slidingly monntedin'a slot 28gprovidedin apitman 29.1. This jpitman is of hollow construction andhouses ajcoil spring 30- which gears against the, outwardly extending portion 27 of the crankarmQG m as shown at 31 to a clamp 32 which is adapted to be detachably' secured; to? the. foot pedal 12. This clamp is shown in, detail in Figures 7 a and 80f the drawingsandcomprisesfa bar 33 90 fromwhich; extend spacedparallelrods 34;. Slidingly mounted upon these rods34 is; a bar =35 :which, together with the bar .33 acts as a Qclam'p to engage the pedal 12; Asshown in the? drawings'the bars 33, and 345' carry grip- B5 ping fingers 36 to engage behind the pedals and thebars areheld in clamping position by means 'ofa' thumb nut 37 which is mount v edupon one end of .a thre'adedrod 38. This rod is carried by the bar 35and1p'asses through p the bar 33. The bar 35 also carries a stud 39 by means of which pivotal connection with the pitman 29 is effected.

In order to stabilize the device and hold the same in position for use there is provided a brace 39. This brace carries at one end a saddle 40 which is preferably pivotally mounted in the bifurcated end- 40a of this brace and which receives the steering post 11. The opposite end of the brace is provided with spaced fingers 406 which are adaptedto' be removably positioned in openings 41 provided in a cross bar 41a of a stand or base 4-2. The brace 39 may thusabe adjustedlaterally of the base or stand 42 so as to properly position the same with respect to the steering post 11, While the pivotal mounting of the saddle 40 enables the latter to properly grip the post; 7

The brace 39 includes oppositely threaded sections 43, thesaddle l0 being carried'by the outer end of one section, while the spaced finfiers 10?) are carried at the outer end of the other section. The threaded sections-43 are connected by an internally threadedsleeve 44: whose outer surface is knurled, so that the brace may be adjusted to properly grip the post 1-1.

Also extending from the stand or base 42 is a brace 50. This brace is of's'ectional construction and includes an inner section 51 which is pivotally secured to the base or stand 42as shown at 52. The section 51 is hollow and receives athreaded section 53 which is adjustable with respect to the section 51 and is held in adjusted position by 111621118013 2 knurled coupling54'. The outer end of the section'53 carries a disk 54: which is adapted to be positioned against the front portion of the front seat of an automobile as shown in Figure 1 of the drawings. A

The motor 20 may receive current from any suitable source of power indicated at B in Figure 1 ofthe" drawings and may be controlled by a switch 45. This switch may be within convenient reach of the mechanic adjusting the brakes so that he can control the operation of the device. A suitable plug and socket connection indicated at 46in Figure 1 may be provided so that the motor maybe readily connected in circuit with a source of power. e When it is desired to depress the pedal 12 and apply the brakes, theswitch 45 is closed so that themotor will'be operated. The operation of the motor will rotate the shafts 15 and 22, but as the crank arm 26 is free'upon the shaft no movement of the crank armwill occur until the pin 25-whi'ch travelsin the direction of the arrow shown in Figurel' of the drawings, engages the crank arm; The pitman 29 will then be forcedin the direction to depress the pedal 12, the'spring 30'com'pensating' for any diiference inthe; degree of movement ofithe pedali As soon as the crank arm 26 passes over center, it will be disengaged from the pin 25 so that it will return under the action of the spring of the brake pedal and will be free of the shaft 22.

In order to cushion the return movement of the crank arm and prevent'a SllCldEll'SlZlD1 ming action, the base or stand 42 has pivotally .secured thereto as shown at 55, one end of a cylinder 56. Operating Within this cylinder is a plunger 57 to which is connected one end of a rod 58. The opposite end of this rod is pivotally connected to the member 27, so that as the pitman 29 returns, return movement will be checked by the compression of air withinthe'cylinder 56. I The cylinder. 56 isprovided with an air escape port 59 which is controlled by a screw 60.

Mounted upon the" gear box 13 is a bell 61 and extendingfrom the clapper of this bell is a pin 62. This pin is located in the path of the crank arm 26 and is engaged by the crank arm j ustbefore the latter passes over-center. The mechanic making thelbrake' adjustment will then be notified: of the position of the brake pedal; l

The invention is susceptible of various changes inits form, proportions and minor details of construction and the right is herein reserved to makesuclr changes as properly fall within the scope of the appended claims. 1 7

Having described the invention what is claimed is I 1. Ina devi'ce'of the characterdescribedm standladapt'ed to be placed in an automobile a crank arm mounted for rotation upon said stand, a pitman havingoneend operatively connected to the crank arm and its: opposite end adaptedfor attachment tothe foot'pedal of the automobile, and'means to operate the crank arm to force thepitman in'one direction and to permit return movement of the pitman. V i

2 In a device of the character des'cribed,.a stand adapted to be placed in an automobile, a crank arm mounted for rotation upon said stand, a pitman, a yieldable pivotal connection between the crank arm: and' one end of the pitman, means at the other end! of the pitman for detachable connection with the bralrepedal' of an automobile, and means to operate thecrankarm toforceth'e pitlnan in one direction and to permit return movement of the pitman.

3. In a device of; the characterdescnibed, a'stand adapted to be placed in an automobile, a crank arm mounted for f'reerotation upon said stand, a pitman' having one end operativel'y'connected to the crank arm and its'opposite end adapted for connection with the foot pedal of an automobile, andmeans to operate the crank arm to force the pitman' in one direction and topermit return movementof the pitman.

, 4. In a device of the character describeia stand adapted to, be placed in an automobile,

a crank armmounted'forrotation upon said stand, a pitman having one end operatively connected, to the crank arm and-its opposite end adaptedfor attachment to thefoot pedal of the automobile, means to operate thec'rank A arm to force the pitmaninone direction and l to permit of free return movement of the pit- 7 man, and means. tocontrol the operation of;

the device from a remote'point.

5. Ina device of the'chara'cter described,a N I I V stand adapted to be placed in an automobile,

a shaft mounted for rotation in said-stand, 7

means to operate the shaft, a crank arm free upon the shaft, apitman having one end operatively connected with the crank arm and'its oppositeend adapted'for connection with the pedal ofan automobile, means to rotate'the shaft, and means operable when the-shaft is I rotated to engage and move the crank arm in a direction to depress said pedal during a partialrotation of theshaft only. 6. V Ina device of the character a stand adapted to be placed in an automobile,

a crank arm mounted for rotation upon said 7 stand, a pitman havingoneend operatively "connected to thecrank' arm and its opposite end adapted for attachment to the foot pedal.

of the automobile, means to operatethe crank arm to force the pitman in one direction and I to permit return movement of the pitman, and

7. Ina

meansto cushion the return movement of the pitman.

stand, apitman'having one end operatively connected to the crank arm and its opposite vend adaptedfor attachment to the foot pedal of the automobile, means to operate the crank arm to force the pitman in one direction and to permitreturn movement of the pitman, a cylinder pivotally mounted at one f end, a plunger within the cylinder, and a rod connecting said plunger with the pitman to yieldingly resist return movement of the pitman.

8. In a device of the character described, a stand adapted to be placed in an automobile, a crank arm mounted for rotation upon said I stand, a pitmanhaving one endoperatively connected to the crankei ar'ml and its opposite end adapted for attachment to the foot-pedal of the automobile, means to operate the crank arm to force the pitman it one direction and to permit return movement of the pitman, a 7 signal, and means to operate the signal when the crank armreaches a predetermined positIOIl."

described,

, device ofthe characterdescribed, a I stand adapted to be placed in an automobile, a crank arm mounted for rotation upon said In testimony whereof I affix my signature. I-IENRY BROS-T. 1 

